Battery Backup Mode (On Batteries); Epo (Emergency Power Off) Function - Toshiba 1600EP SERIES Instruction Manual

Battery Backup Mode (on batteries)

The following illustration shows power fl ow during the battery backup mode. When commercial AC power
failures occur, the UPS's batteries instantly begin supplying DC voltage to the UPS's main inverter circuit.
This circuit changes (inverts) the DC power into AC power. The AC power is available at the unit's output.
This back-up process will continue until the UPS's battery voltage drops below a specifi c minimum level.
When this occurs, the batteries will stop supplying power to the load. This minimum level is the rated
minimum voltage (Vmin). The rated battery voltage chart on
time and discharge process is explained on
MCCB
Input
power
Surge
absorber

EPO (Emergency Power Off) Function

These units are equipped with terminals for receiving an emergency power-off (EPO) "closed contact"
switch command from a remote location (see 'terminal block details' on
location on page 53-54). This safety feature enables quick shut-down of the UPS's AC output and battery
circuits. Usually the emergency power off switch is installed in a central location that is easily accessible
to personnel concerned with the operation of the UPS unit and the load equipment connected to it. The
EPO function is initiated by pressing the switch to the closed "shutdown" position. The effect of using the
EPO switch is the same whether the UPS unit is in the
TRIPPED
MCCB
Input
power
Surge
absorber
30
Bypass
Input
fuse
Rectifier/
Line Filter
Chopper
Batteries
Power flow in battery backup mode for all models
POWER FLOW IN BATTERY BACKUP FOR ALL MODELS
Bypass
Input
fuse
Rectifier/
Line Filter
Chopper
OFF
Batteries
page 28 shows (Vmin). The battery backup
page 28.
*Static
switch
Output
fuse
Inverter
+
*Switches are
solid state
_
devices
*Static
switch
Output
fuse
Inverter
OFF
+
*Switches are
solid state
_
devices
Isolation
Transformer
Line Filter
Power flow
page 16 and terminal block
Isolation
Transformer
Line Filter
Power flow
1600EP Series Instruction Manual
Output
power
Output
power
(off)